Description of Bug: If you have two stacks of unique items in the same stacks, pressing spacebar will open two dialgoues that have to be closed seperately. Placing a third unique item makes the mechanic behave as expected.
Reproduction Steps:

1.  Have two unique items placed on a surface
2.  Press spacebar to collect one of them
3.  Have two dialogues appear, that can be closed with esc. 

Error message (if applicable):
Screenshots: